Good evening.
I am writing from Italy.
I would ask you some questions.
I am using Arduino's IDE to compile a simple code for the integrated wifi on the ESP.
The problem is that, after several iterations, memory drops down (is that the exact verb?)
I show you a memory-time graphic.
Code is very simple.
#include <ESP8266WiFi.h>
extern "C" {
#include "user_interface.h"
}
const char* ssid = "FASTWEB-1-2EED7F";
const char* password = "B9AF909FEE";
const char* url = "http://www.*.it/*/classes.php";
#include <ESP8266HTTPClient.h>
#include <ESP8266WiFi.h>
void setup() {
Serial.begin(115200); //Serial connection
WiFi.begin(ssid, password); //WiFi connection
while (WiFi.status() != WL_CONNECTED) { //Wait for the WiFI connection completion
delay(500);
//Serial.println("Waiting for connection");
}
}
void loop() {
if(WiFi.status()== WL_CONNECTED){ //Check WiFi connection status
HTTPClient http; //Declare object of class HTTPClient
String url_ESP_on = url;
url_ESP_on += "?request=showUsingMacAddress&version=ESP1.0&MacAddress=";
url_ESP_on += WiFi.macAddress();
//Serial.println("Sto contattando l'indirizzo " + url_ESP_on);
http.begin(url_ESP_on); //Specify request destination
http.addHeader("Content-Type", "application/x-www-form-urlencoded");
int httpCode = http.POST(""); //Send the request
String payload = http.getString(); //Get the response payload
//Serial.println(httpCode); //Print HTTP return code
//Serial.println(payload); //Print request response payload
http.end(); //Close connection
String url_request = url;
url_request += "?request=cleanAllUsingMacAddress&MacAddress=";
url_request += WiFi.macAddress();
//Serial.println("Sto cancellando l'ultimo comando contattando l'indirizzo " + url_request);
http.begin(url_request); //Specify request destination
http.addHeader("Content-Type", "application/x-www-form-urlencoded");
httpCode = http.POST(""); //Send the request
payload = http.getString(); //Get the response payload
//Serial.println(httpCode); //Print HTTP return code
//Serial.println(payload); //Print request response payload
http.end(); //Close connection
//Serial.print("freeMemory()=");
Serial.println(system_get_free_heap_size());
url_ESP_on = "";
url_request = "";
}else{
Serial.println("Error in WiFi connection");
}
delay(500); //Send a request every 30 seconds
}
Do you have any suggestion?
This esp is supposed to work 24/7 for years.
Thank you very much
